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Select the correct order of C-O bond ord...

Select the correct order of `C-O` bond order in mixed phosphine carbony1 complex
(I) `[Mo(Ph_(3)P)_(3)(CO)_(3)]` (II) `[Mn(Ph_(2)PCI_(3))(CO)_(3)]` (III) `[Mo(PhCI_(2))_(3)(CO)_(3)]` .

A

IgtIIgtIII

B

'IgtIIgtIII'

C

I=IIgtIII

D

IltIIgtIII

Text Solution

Verified by Experts

The correct Answer is:
B
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If in the mixed carbonyl the other ligand is also pi acceptor it would compete with the ligand CO for gaining the metal d_(pi) electron charge The higher is the extent of back donation in CO , the lesser will be the stretching vibration frequency for C-O bond If PP_(3) is better pi-acceptor than CO then answer the following Select the correct order of C-O bond length in the following molecules . (I) [Mo(CO)_(3)(PF_(3))_(3)] (II) [Mo(CO)_(3)(PCI_(3))_(3)] (III) [Mo(CO)_(3)(P(Me)_(3)_(3)] (a) IgtIIgtIII (b) IIIgtIgtII (c) IIgtIIIgtI (d) IltIIltIII

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CENGAGE CHEMISTRY-COORDINATION COMPOUNDS-Exercises Single Correct (Application Of Coordination Compounds And Miscellaneous)
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